package com.mikey.add;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

/**
 * @author :Mikey
 * @description :
 * @create :2022-09-21 11:32:00
 */
public class SemaphoreDemo {
    public static void main(String[] args) {
        //线程数量,停车位，限流的时候使用
        Semaphore semaphore = new Semaphore(3);

        for (int i = 0; i < 6; i++) {
            new Thread(()->{
                //acquire()得到
                try {
                    semaphore.acquire(); System.out.println(Thread.currentThread().getName()+"抢到车位");
                    TimeUnit.SECONDS.sleep(2);
                    System.out.println(Thread.currentThread().getName()+"离开车位");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    semaphore.release();
                }
                //rellease()释放
            },String.valueOf(i)).start();
        }

    }
}
